468、当液压系统 B 的发动机驱动泵压力低于正常时，液压动力转换组件系统为前缘襟翼和缝翼提供备用液压。

1021、不要摇晃物体。

1020、The chronographs function does not calculate hours.

1019、This document provides supplementa1 to the applicable airplane maintenance manual.

1018、All the materials used to seal the tanks are fully resistant to all the fuels and the fuel additives.

1017、For simplicity of presentation fand understandability, complex systems should be divided into system-function ratherthan overall master schematic diagrams.

1016、A system is a combination of interrelated components arranged to perform a specific function.

1015、The aircraft may be maintained in accordance with the latest information issued by the manufacturer.

1014、The sequence of topics in the Handbook is intended to increase in-flight usefulness

1013、如需变更维修方案,须经设计部门批准。

1012、Instead of using the actual date of issue on each page of an original issue of a Document; the words ORIGINAL ISSUE" maybe used. In such a case the Title Page and the Table of Contents pages preceding each section of the Document must bearthe actual date of issue following the words “ORIGINAL ISSUE"."